Perform incremental compilation, and run the updated program.

dart/tests/try/web/incremental_compilation_update.html

Index: dart/tests/try/web/incremental_compilation_update.html
diff --git a/dart/tests/try/web/incremental_compilation_update.html b/dart/tests/try/web/incremental_compilation_update.html
index d929ba9d14acdfd93233e1fe3ec9dbdf70349d24..54e929f61e5155cc4fb0f991096b8ee4ada8d320 100644
--- a/dart/tests/try/web/incremental_compilation_update.html
+++ b/dart/tests/try/web/incremental_compilation_update.html
@@ -13,16 +13,20 @@
     <pre id="console"></pre>
 <script type="application/javascript" src="print.js"></script>
 <script type="application/javascript">
-/// Invoked by JavaScript code generated by dart2js when the program is ready
-/// to invoke main.
-function dartMainRunner(main) {
-  // Invoke the "main" method of the Dart program.
-  main();
-
-  // Let the sandbox embedder know that main is done running.
-  window.parent.postMessage('iframe-dart-main-done', '*');
-}
 (function() {
+  var dartMainClosure;
+
+  /// Invoked by JavaScript code generated by dart2js when the program is ready
+  /// to invoke main.
+  self.dartMainRunner = function dartMainRunner(main) {
+    dartMainClosure = main;
+
+    // Invoke the "main" method of the Dart program.
+    main();
+
+    // Let the sandbox embedder know that main is done running.
+    window.parent.postMessage('iframe-dart-main-done', '*');
+  }
 
   /// Invoked when a 'message' event is received. Message events are generated
   /// with Window.postMessage and used to communicate between this iframe and
@@ -35,6 +39,13 @@ function dartMainRunner(main) {
       script.src = e.data[1];
       script.type = 'application/javascript';
       document.body.appendChild(script);
+    } else if (e.data[0] === 'apply-update') {
+      self.$dart_unsafe_eval.patch(e.data[1]);
+
+      dartMainClosure();
+
+      // Let the sandbox embedder know that main is done running.
+      window.parent.postMessage('iframe-dart-updated-main-done', '*');
     } else {
       // Other messages are just logged.
       console.log(e);